Instructions: 1. Two buttons; (CALIBRATE) and (DISPLAY) 2. Measurement unit: unit can be selected through the panel button with the following: liter (LTR ), gallon (GAL), pint (PT), quart (QT). When changing unit, press and hold (CALIBRATE) button for 5 seconds, the digits on display will flash from left to right; press (DISPLAY) to move to the last position, unit will flash from top to bottom, then press (CALIBRATE) to select unit. 3. Standby state: standby state is low power consumption state; when there is measurement pulse input, it will display real-time filling quantities. 4. Measurement range is 9999.9, if over this range, it will automatically reset to zero. 5. Real-time filling amount reset: Press (DISPLAY) button to reset real-time quantity to zero. Cumulative quantity reset: take out battery, and when put battery back in, press and hold (DISPLAY) to reset cumulative quantity. 6. The default unit of real-time measurement is Liter (LTR). 7. At standby state or when it shows real-time filling quantity, press and hold (CALIBRATE) to display cumulative filling quantity. 8. Release (CALIBRATE) button or when there is measurement pulse input, it will return to display of real-time filling quantity.
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